r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 97

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Table 4.7
4.6.2
Figure 4.4 shows an example of an external clock input connection. In this case, make the external
clock high level to stop it when in software standby mode. During operation, make the external
input clock frequency 5 to 12.5 MHz.
When leaving the XTAL pin open, make sure the parasitic capacitance is less than 10 pF.
Even when inputting an external clock, be sure to wait at least the oscillation stabilization time in
power-on sequence or in releasing software standby mode, in order to ensure the PLL stabilization
time.
Frequency (MHz)
Rs Max. (Ω) (Reference values)
C
0
Max. (pF) (Reference values)
External Clock Input Method
Crystal Resonator Characteristics
EXTAL
Figure 4.4 Example of External Clock Connection
XTAL
5
120
7
Open state
8
80
7
Rev. 1.00 Sep. 21, 2007 Page 71 of 1124
External clock input
Section 4 Clock Pulse Generator (CPG)
10
60
7
REJ09B0402-0100
12.5
50
7